<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录区域表单 -->
      <el-form ref="loginFormRef" label-width="0px" :model = " loginForm " :rules= "loginFormRules" class="login_form">
        <!-- 用户名 -->
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
      </el-form-item>
      <!-- 密码 -->
       <el-form-item prop="password">
        <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
      </el-form-item>
      <!-- 按钮区域 -->
       <el-form-item class="btns">
       <el-button type="primary" @click= "login">登录</el-button>
       <el-button type="info" @click= "resetLoginForm">重置</el-button>
      </el-form-item>
     </el-form>
    </div>
  </div>
</template>
<script>
export default {
 data () {
  return {
    // 这是登录表单的数据绑定对象
    loginForm: {
      username: 'admin',
      password: '123456'
    },
    // 这是表单验证的规则对象
    loginFormRules: {
      // 验证用户名是否合法
      username: [
        { required: true, message: '请输入登录名称', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
      ],
      // 验证密码是否合法
      password: [
         { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
      ]
    }
  }
},
methods: {
  // 点击重置按钮，重置表单
  resetLoginForm () {
    // console.log(this)
    this.$refs.loginFormRef.resetFields()
  },
  login () {
    this.$refs.loginFormRef.validate(async (valid) => {
      console.log(valid)
      if (!valid) return
     const { data: res } = await this.$http.post('login', this.loginForm)
     console.log(res)
    if (res.meta.status !== 200) return this.$message.error('登录失败！')
    this.$message.success('登录成功！')
    // 把token保存到sessionStorage中
    window.sessionStorage.setItem('token', res.data.token)
    // 通过编程式导航跳转到home页
    this.$router.push('/home')
    })
  }
}
}
</script>
<style lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100%;
  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avatar_box{
      width: 130px;
      height: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img{
        width: 100%;
        height: 100%;
         border-radius: 50%;
        background-color: #eee;
      }
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
